Pressure-increaser.



E. F. LOYD. PRESSURE INGREASBE. APPLIQATION ill-ED mm. 21,1911 g I 1 090 866, Patented Mar. 24, 1914;

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E. F.. LLOYD. PRESSURE INCRBASBR. APPLICATION FILED DEC. 21, 19-11.

1,090,866.. Patented Mar.24,191

2 SHEETS-SHEET 2.

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' Pmsvmmceeasm To all whmitt'tmay es eem "Be a kn-own Jthat 'If EIiNET'FL LLOYD, a citizen'lof the; TilIrited States' of America, residing; at "Detroit, "in the county of Wayne and State of Michigan, have, invented certain newfandfuseful Improvements in Pressure-ln'creaserg-fiof which {the following is a specification, reference being had there1n, to the accompanying drawings.

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This invention relates to gas distributing systems and more especially 1to.'a'=pressure increaser or means in the system for automatically controlling the flowo'tgas or the like through a main or conduit whereby the pressure at a given point-in the main is madeto build up as the volume of gas pass-' ing such point increases.

The invention consists in the matters here inatfter set forth and more particularly pointed out in the appended claims. 1

2 In the drawings, Figure 1, is a view par.

tially .in section and partially in elevation, of an apparatus embodying features of the invention; Fig. 2, is a plan View in detail of a loader connection for a master valve; and Fig. 3'is a view'in-section and in detail of a master valve. r

As shown in the drawings, .a main or conduit has an automatic regulating valve 1 that'controls the flow from the inlet arm 2 of the main to the outlet arm 3 and holds the pressure, in the latter arm under ordinary conditions at a constant point .in relation to atmospheric pressure. The pressure in the *inletgarm 2 is higher "than that in the outlet 1 i In preferred form the valve 1 has a pair of closures 4 adapted to close ,on annular seats 6 in the valve casing. The stem 7 carry'ing the closures operatively connects them to a movable or flexible diaphragmfi that divides a drum 9 into an upper and a lower compartment. A tension spring 10 in a tubular extension 11 of the drum maybe adjusted on a suspending screwthreaded rod 12 to exert aconstant upwardpull on the diaphragm 8. r r a A pipe 13 connects, the lower .compart- 'ment of the drum 9 with one' outlet of a master valve 14; and the other drum chamb'er'is in communication through a pipe 15 with another outlet or the same valve. A pressure or power gas pipe 17 connects the inlet of the master valve with the high pressure or inlet arm 2 of the conduit, or-other' source of supply of gas under pressure. A

- the p speci fieation"oi Letters Patent. Patented Mar, 241, 19141. .t Application filed December 21, 1911' serial No. esaoev.

waste pipe 19 leads from an exhaust open-' moving between seats 25 and 26 disposed on opposite sides of an outlet 27 into the pipe 15., Theinlet 28 of the pressure or power gas pipe 17 is between thegtwo pairs of seats while the exhaustopening 29 of the valve into the waste pipe 19 is connected with a bypass 30 in communication with the spaces betweenthevalve'seats as shown. The stem '18 may extend through a stuffing box, or, preferably, a packing diaphragm 31 intoa drum 32 and is connected to a movable or fiexible. diaphragm in the latter,

' whereby theapressureof gas introduced beneath 'the diaphragm through a pipe 34 from the outlet arm of the conduit acts to raise the'stem against weights 85 placed on a receptacle or bowl 36 of the stem. Thus as the pressure increases in the outlet arm of the main causing the stem 18 to rise, the tendency of the master valve is to shunt gas from the pressure or power gas pipe 17 through the pipe 13 under the lower side of the diaphragm f the regulating valve 1 and thereby close the latter correspondingly, the gas in the upper compartment of drum 9 escaping through the pipe 13 and the. waste pipe 19 into the low pressure armofthe conduit or elsewhere. Conversely when the pressure in the outlet arm of the conduit falls the weights of the stem 18 lower the latter so that the master valve tends to deliver the power gas through the pipe 15 on to the diaphragm 8 and open the regulating valve correspondingly, the gas in the lower compartment of the drum escaping through the pipe 13 and waste pipe 19.

The weights on the closure stem of the "master valve determine the range of action of the governonwhich tends to hold the pressure substantially constant in the outlet arm. Such pressure may be termed nor- 'mal or set, In order, however, that the regulator may allow the pressure to increase as the volume of gas passing through the outlet increases, means operated by an artificial or local drop in pressure at a given point preferably in the outletarmare employed toincreasethe weight; on the master valve, and thus cause the latter to open the regulating valvewhen under excess pressure or pressure above the normal.

Preferably, this weight increasing means isof the, type described in my application filed February 14, 1911, Serial No. 608,487,

for mercury loaders. A'valve 37 forms a convenient and adjustable adj utage for causing the desired drop. A by-pass 38 is fpflaced around this point of drop and a enturi tube 39' is inserted in the by-pass for multiplying the effect of the difl'eren- I tial or velocity pressure thus obtained. The.

pipe 40 from the head of the venturi enters the compartment of a pressure drum 41 of aloader above a movable or flexible diaphragm 42.. A throat pipe 43 from the venturi communicates with the drum below the diaphragm,v A stem 44 moved by the diaphragm 42 passes up through the well 45' of a float chamber 46, with a tubular sleeve 47. depending over the well and carrying a displacement float 48. The chamber, which is disposed at an appropriate level in relation to the bowl 36 of the master valve and is filled with mercury or like weighting fluid to the desired depth, hasja transverse pipe 49 that leads to the bowl 36 through a flexible hose 51 or the like enterning the latter and permitting 'free movement of the-same. As a matter of convenience a casing 50 shields the bowl and forms a support for the transfer pipe. As the velocity pressure ofthe venturi increases the resultant downward movement of the'diaphragm 42 depresses the float 48 thereby. forcing the level ofv the mercury in the chamber up into, the narrow annular space between the float. and chamber wall, so that it flows over into the bowl thereby-increasing the load onthe latter and tending to shunt the power gas to open the regulating valve 1. A stop screw 52 or the llke limits the downward movement of the diaphragm 42 and displacement float 48 so that the apparatus may be set to impose only a predetermined maximum of excess load on the master 'valve. This form of displacement loader for the master valve is preferable although obviously other types may be used which transfer Weight or the pull of weights to add to the load of the master valve.

In operation, the regulating valve is controlled by ,the master valve to hold a desired pressure in the outlet arm of the main,

within a range determined by the weights placed upon the master stem valve, such weights being adjustable to meet conditions ofservice. Beyond this range the loader acts to cause a rise and fall of pressure above the normal or set pressure in exact proportion to variations in volumes of flow. The volume of flow to cause a de-,

sired dropjmay bevariedby changing the adjustment of the 'adjutage valve. In other care to limit myself to anyparticularv form or arrangement of parts. j I I claim:- l 4 '1. The combination-cwith a conduit, of

regulating means controlled by fluid pres- 7 sure for. automatically maintaining a constant pressure in the outlet side of the con- .fluid under pressure tO-operate the regulator, means for settingjupa drop in presduit, means for controlling the admission of" sure in the conduit, andmeans controlled:

by variations in the drop in pressure and adapted to control the pressure fluid admitting-means by gravity to raise the pressure in theconduit as the' flow pastthe point of drop increases.

2. The combination with a 'conduit, of a fluid pressure operated regulator therein for maintaining constant pressureRin the com duit on the outlet side =of the regulator, means controlled by fluid pressure for admitting fluid under pressure'to operate the regulator, means for 'causing a; drop in pressure at a point in the conduit, and means operated by the variations in thisdrop inv pressure and adapted to. impose aJ-gravity load upon the pressure fluid. admitting means to increase the pressure in the con i v.

duit as the flow past the point of" drop increases.

3. The combination with a conduit,-. ot-1a I f regulator operated by fluid under pressure and adapted to automatically ma1ntain- .a

constant-outlet pressure the. conduit, *a,

master' valve controlled'by fluidunder pressure in the conduitacting. in oppositionto'" gravity to admit fluid under pressure to op-J erate the regulator, means for causing dropv i v in pressure at a point inthe condu t, and

means operated by fluid pressures on each 7 side of the point of drop and adapted to' I increase the gravity load on the master valve as the flow pastthe point of drop increases. v

4. The combination with a conduit, ofa regulating valve therein, means-operated by fluid under pressure for shifting the valve to maintain a constant outlet pressure in,

the conduit, a master valve controlled .by the outlet pressure of the conduit operating in opposition to gravity to admit fluid under pressure to the regulating valve operating means-to close thevalve as the pressure increases and open it as it decreases, means for causing a drop in pressure at a point in the conduit, and means operated by the fluid pressures on Opposite sides of the point of drop. and adapted, to increase the effect of gravity upon ,the master valve;

5. The combination with a" conduit, of a regulating valve, fluid pressure operating means for shifting the regulating valve, a

master valve'controlled by fluid pressurein' the conduit operated in opposition to a gravity load on the master valve for admitting fluid under pressure to the regulating valve operating means, and means controlled by a differential pressure at-a point,

regulating valve, a shiftable member for operating the valve adapted to be moved by fluid under pressure, a master valve controlledby pressure in the conduit 'actingin opposition toa gravity load and adapted to admit fluid under pressure to the regulating member, means for causing a drop in pressure at a point 1n the conduit, and means controlled by variations in this drop ,-in pressure for increasing the gravity load on the master valve when the flow'past the point of drop in the conduit increases.

In testimony whereof I affix my signature in presence of two witnesses.

ERNEST F. LLOYD.

WVitnesses 017170 F. BARTHEL, ANNA-M. Done.- 

